Type of person who'll be up for a race? (6)
I believe the answer is:
jockey
'a race?' is the definition.
(I know that jockey is a more specific form of the action horse-race)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for jockey that I've seen before include "Manoeuvre for advantage like horse race rider" , "Rider of racehorse" , "A professional horse rider" , "Struggle for position" .)